[SOLVED] how to get oscilloscope curve value at time 0

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james.qiu

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hello ,
in my application , thers is a ramp voltage from 0 to 10Volt within 100ms, and a trigger voltage setting high （5Volt）when ramp voltage near 5Volt.
if i use oscilloscope channel 1 connect to ramp voltage and channel 2 connect to trigger voltage and set trigger channel2 rising edge at time base 0. when trigger happen, how can i get the ramp voltage value-channel1 value at time 0 and return it to my testbench.
I don not want to save the all curve data and find the cross point value manually.
 

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Hi,

which scope are you using? A DSO usually has the possebility to place markers to perform measurements, so the value of interest should be displayed on the scope screen. This should be the easiest way for a "pen & paper" approach to transfer the obtained to your testbench. Of course, an old-school "analog" approach will work as well, by means of counting your x-axis divisons and sub-divisons and do the math, in accordance to your chosen Volt-per-Divison (V/Div) setting.

BR
 
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thanks， it reminds me these is a cursors function ， and i can choose mode track and put cursor at time 0.
 

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